(copied from AC1DGro0ve 3o3 post on an other boosting site)
How to boost:

Requirements
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Time: 3-4hrs
Game Mode: Sector Control
Gamers: 24, split into 4 parties of 6, with 1 gamer being the messenger.
(The messenger will be the one jumping from party to party relaying tactics to drive randoms from the game. You need to have everyone on the same page for this. ...so if you need to tell one side not to spawn, you can do so.)
ClanTag: TA
(***Important*** This is to identify boosters from randoms)

Method
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Monopolize a game of 'Sector Control'.

1. The host will create a play group and invite each party leader to it, then search for a game of 'Sector Control'. Once a game is found, be sure to have atleast 1 party leader on each side.
2. Have all remaining gamers join their party leader's game in progress, from the 'Play with friends' in-game menu, as spots become available.
3. Continue to create spots in the game for the others to fill. There are a number a ways to do this. (i.e., Not spawning, Follow and shoot a team member, Block his view, etc.) Just be creative until the random gets pissed off enough to find another lobby.
4. Once all 24 spots are owned, then start the 'Flag Dance'.
5. Meet up at Bravo and alternate capturing the flag. (with everyone at Bravo, you will not have to worry about accidentally calling in offensive support actions on top of other players on the map.)
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The time will be on the next friday the 25th, 9 PM GMT (UK time)
We need 24 players before we try anything if not 24 players have joined before the 25th, we jump another week to 1st of April.

I'm down to play whenever. The online Multiplayer Fire Controller achievement is the last one besides level 15 and 2 hours on the modes I need. Then to campaign. Hit me up whenever your on, gamertag is goldyman77

Attention everyone who wants to boost fire controller. I have 3 people as of right now willing too boost this. We will be on tonight at 9 est. If your interested please add you gamertag to this list. Also my gamertag is Destroyer 776